If the calf is gentle, and builds your daughter's confidence level and she gains experience -- it's all good!! My son had a steer that bucked over in the knees as it got heavier. He was dog gentle and showed like a dream. He won showmanship with him every time he went in the ring. My son was happy with the buckles he won that year! As long as your daughter has a positive experience, it's worth it.
Would like to see pictures tho...